Hello people, I am in need of creative advice on how to get my Delta miles onto my United miles, reason being I have 100,000+ on United and 67,000 on Delta, but I plan on using them early this spring to take my mum to Australia, and it takes only 60,000 to go coach on United so I would like to be able to get both tickets and upgrades on United instead of Delta which charges 120,000 miles for the same fare. Any clever way of transferring is appreciated.

Sincerely,

Betty